Novella published in Galaxy Science Fiction (November 1952). Blurb: "It was junk they hunted, but enormously valuable and urgently needed junk that cost only bravery and the cheapest fuel ... yet they were kept from collecting it by an even cheaper lie!"
November 12, 2014 Subject:
Excellent story about the colonists of Mars vs 'Them Grounders on Earth". A threatened embargo of water (that they need as reaction mass and as.. Duh! water!) forces a daring expedition longer and further into space then ever attempted before.
Clarke would have been more careful with the math but a good read nonetheless.